Wrench



J. l..-BARNES.

WRENCH.

APPLICATIION FILED MAYiS, 1920.V '1,393,070' Patented Oct. 11, 1921.

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PATENT oFFIcE.

JQSEPI-I L. BARNES, 0F PITTSBURGH, PENNSYLVANIA, l

WRENCH.

Application filed May 18,

To all whom t may concern.'

Be it known that I, JOSEPH L. BARNES, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements i n Wrenches, of which the following is a specification. l

This invention relates to wrenches and has for its object the production of a simple and efficient wrench having an adjustable jaw which may be varied to suit the different sizes of nuts upon which the wrench is adapted to operate. n

Another object of this invention is the production of a simple and efficient means for moving the slidable or adjustable Jaw upon the head of the wrench.

Another object of this invention is the production of a simple and efficient wrench having a pivotally mounted spring pressed jaw which will permit the spring pressed jaw to slide easily over the nut while the wrench is being swung to the 'left for the purpose of getting a fresh grip. upon the nut and which will at thev same time firmly grip the nut as'the handle is again moved toward the right for the purpose of threading a nut upon a bolt.

[With these and other objects in view, this invention consists of certain novel constructions, combinations and arrangements of parts which will be hereinafter fully described and claimed.

In the drawings Figure 1 is a side elevation of the wrench,

Fig. 2 is a vertical section through the headbof the wrench,

Fig. 3 is a top plan view of' the wrench,

Fig. 4 is a section taken on line %4 of Fio. 2, and

F ig. 5 is a detail perspective view of the spring pressed jaw adapted to be used in connection with the wrench.

By referring to thevdrawings, it will be seen that 1 designates the handle of the wrench which may be formed of any suitable or desired construction, and this handle is provided with an enlarged head 2, this hea-d 2 supporting the spring pressed jaw 3 and the slidably mounted jaw 4. This spring pressed jaw 3 is provided with an elongated arm 5, this arm being pivotally mounted within the socket 6 formed in the head 2 of the wrench. The arm 5 is pivotally Specification of Letters Patent.

Patented Oct. 11, 1921. 1920. Serial No. 382,213. v

mounted upon a pin 7 as clearly shown in Figs. 1 and 2. The spring pressed jaw 3 is also provided with an enlarged head 8, the head being provided with lower beveled shoulders 9, the beveled shoulders 9 being adapted to rest in engagement with the beveled faces 10 formed upon the head of the wrench 1, thereby permitting the jaw 3 to fit snugly in engagement with the head, and when ina normal position, constitutes an extension of the handle of the wrench. The head 8 of the spring pressed jaw 3 is provided with a vertically extending nut gripping facev 11 and an inclined nut gripping face 12. A pair fingers 13 are formed integral with the head 8 as clearly shown in Fig. 5 and these fingers 13 are adapted to fit within the notches 14 formed upon the upper,- face of the head 2 of the wrench. It should be understood that when a nut is placed in engagement with the jaw 3 and bears firmly against the vertical face 11, inclined face 12 and fingers 13, the jaw 3 will be firmly held against swinging movement. The jaw 3 may be held against swinging movement by pressing the handle 1 inwardly and forcing the fingers 13 into engagement with the nut. However, by withdrawing the handle 1 slightly away from the nut, the jaw 13 may be permitted to swing outwardly against the pressure of the spring 15 which is mounted within the socket or pocket 6. This spring 15 is adapted to engage the cutout portion 16 formed in the lower end of the arm 5 of the jaw 3. The spring 15 will, of course, normally hold the jaw 3 in a closed position.

The head 2 of the wrench is provided with a substantially circular channel 17 extending across the top of the head, this channel terminating at the top thereof in a longitudinally extending slot 18. The adjustable jaw 4 above described is provided with a reduced neck or web portion 19, which terminates at its lower edge in a substantially longitudinally extending barrel portion 20, the lower edge of which is provided with a series of rack teeth 21. The enlarged barrel portion 20, by fitting within the circular channel 17 will in this way prevent the adjust-able jaw 4 lfrom being detached or accidentally disengaged from the head of the wrench 2. The web portion 19 is arranged centrally of the jaw 4 as clearly shown in Fig. 2 of the drawing and it eX- of inwardly extending tends downwardly on an incline for producing an inclined face 22 extending from the inner face 24 of the jaw to the extreme outer end of the substantially barrel portion 2O of the jaw 4. rlhe jaw 3 is provided with a notch portion 25 formed in the underface thereof to permit the inclined portion of the web 19 to fit or extend thereunder. The

jaw 3 is alsoV provided with an aperture 26 formed therein, within which aperture 26 extends the forward end of the barrel portion 20 of the jaw 4 but it should be understood that in view of the fact that the jaw 4 is provided with the inclined face 22, the jaw 3 may be readily swung outwardly without binding upon the upper face of the jaw 4. A worm screw 27 is mounted within a socket 28 formed in the head 2 of thel wrench and this worm screw is journaled upon a pin 29 mounted within the head 2V as clearly shown in Fig. 2 of the drawing. As is shown in Fig. 3 the head 4 overhangs the upper end of the jaw 2 and in this way braces the jaw 4 against lateral swinging movement.

The lower edge of the aperture 28 is beveled as indicated at 30 in Fig. l upon each side of the head 2 of the wrench l in order to facilitate the operation of the wormV an adjustable jaw coperating with said swinging jaw. j

2. A wrench of the class described comprising a head, a pivotally mounted jaw carried by said head and provided with an elongated arm, said jaw provided with a plurality of overhanging shoulder portions adapted to engage said head, said jaw also provided with a plurality of inwardly extending lingers adapted to overhang the headof the wrench, an adjustable jaw slidably mounted upon said head, and means for sliding said adjustable jaw across said head to an adjusted position relative to said pivotally mounted jaw.

3. A wrench ofthe class described comprising a head, a pivoted jaw provided with' an elongated arm, inclined shoulders formed across the same, said channel terminating in a narrow slot along the upper'edge of said head, an adjustable jaw having a reduced shank portion working within said slot, an enlarged barrel portion working within 'said substantially circular channel portion, said barrelportion provided with rack teeth formed upon the lower face thereof a worm screw en a in said rack teeth for moving said adjustable jaw across said head, said shank provided with an inclinedV beveled face upon the upper edge thereof, a swinging jaw mounted upon said head and provided ywith a transversely eX- tending aperture intov which the .forwardV ends of said barrel portion of said adjustable jaw fits, and said Swinging jaw provided with an inclined notch formed upon the underfacethereof for receiving the inclined face of said web portion of said adjustable jaw.

5. A wrench ofthe class described comprising a heady provided with a channel, an adjustable jaw, a shank attached tothe jaw and slidable in thev channel in the head, means for adjusting the jaw, a swinging jaw having an inclined gripping face, mounted upon said head and provided with a transversely extendingl aperture into which the forward end of said shank may slide, said shank provided with an inclined gripping face upon the upper edge thereof.

In testimony whereof I affix my signature in presence of two witnesses.l

JOSEPH L. BARNES.

llVitnesses:

Ensor. V. REEVES,l P. J. Cnrnn RANDALL. 

